sim-se: Add prlimit system call

[gem5.git] / src / sim / faults.hh

diff --git a/src/sim/faults.hh b/src/sim/faults.hh
index dd42c35aba6cdabb8de7a0fb911675b5f3321568..be7aab582ea5c5bd5137d3740acb175ad79e36c7 100644 (file)
--- a/src/sim/faults.hh
+++ b/src/sim/faults.hh
@@ -41,13 +41,6 @@ class ThreadContext;
 typedef const char * FaultName;
 typedef Stats::Scalar FaultStat;
 
-// Each class has it's name statically define in _name,
-// and has a virtual function to access it's name.
-// The function is necessary because otherwise, all objects
-// which are being accessed cast as a FaultBase * (namely
-// all faults returned using the Fault type) will use the
-// generic FaultBase name.
-
 class FaultBase
 {
   public:
@@ -65,7 +58,7 @@ class UnimpFault : public FaultBase
         : panicStr(_str)
     { }
 
-    FaultName name() const {return "Unimplemented simulator feature";}
+    FaultName name() const { return "Unimplemented simulator feature"; }
     void invoke(ThreadContext * tc, const StaticInstPtr &inst =
                 StaticInst::nullStaticInstPtr);
 };
@@ -73,18 +66,34 @@ class UnimpFault : public FaultBase
 class ReExec : public FaultBase
 {
   public:
-    virtual FaultName name() const { return "Re-execution fault";}
+    virtual FaultName name() const { return "Re-execution fault"; }
     ReExec() {}
     void invoke(ThreadContext *tc, const StaticInstPtr &inst =
                 StaticInst::nullStaticInstPtr);
 };
 
+/*
+ * This class is needed to allow system call retries to occur for blocking
+ * system calls in SE mode. A retry fault will be generated by the system call
+ * emulation code if blocking conditions arise; the fault is passed up the
+ * function call chain into the CPU model where it is handled by retrying the
+ * syscall instruction on a later tick.
+ */
+class SyscallRetryFault : public FaultBase
+{
+  public:
+    virtual FaultName name() const { return "System call retry fault"; }
+    SyscallRetryFault() {}
+    void invoke(ThreadContext *tc, const StaticInstPtr &inst =
+                StaticInst::nullStaticInstPtr);
+};
+
 class GenericPageTableFault : public FaultBase
 {
   private:
     Addr vaddr;
   public:
-    FaultName name() const {return "Generic page table fault";}
+    FaultName name() const { return "Generic page table fault"; }
     GenericPageTableFault(Addr va) : vaddr(va) {}
     void invoke(ThreadContext * tc, const StaticInstPtr &inst =
                 StaticInst::nullStaticInstPtr);
@@ -95,7 +104,7 @@ class GenericAlignmentFault : public FaultBase
   private:
     Addr vaddr;
   public:
-    FaultName name() const {return "Generic alignment fault";}
+    FaultName name() const { return "Generic alignment fault"; }
     GenericAlignmentFault(Addr va) : vaddr(va) {}
     void invoke(ThreadContext * tc, const StaticInstPtr &inst =
                 StaticInst::nullStaticInstPtr);